A lot of people I know do a poor job of performing regular spyware removal. Free computer security software for spyware is easy to find at reputable sites like download.com. One of the more popular free programs is Ad-Aware, but plenty of other programs like Yahoo Anti-Spy will also get the job done. In fact, it doesn't hurt to regularly run 2 anti-spy software programs just in case one program detects a problem that another program does not catch.
After you install it, all you need to do is keep the software updated with the latest spyware definitions and run the program regularly (running it daily is recommended). Some programs will even schedule regular scans for you......although you may need to upgrade to a paid subscription for this service.
It is important not to take this too lightly. A nasty spyware program can create havoc on your system and even steal valuable information like passwords and credit card numbers. Scanning regularly has become essential computer maintenance.